Reflection and transmission of waves

To access the translated content:
1. The translated content of this course is available in regional languages. For details please visit nptel.ac.in/translation
The video course content can be accessed in the form of regional language text transcripts, books which can be accessed under downloads of each course, subtitles in the video and Video Text Track below the video.
Your feedback is highly appreciated. Kindly fill this form forms.gle/XFZhSnHsCLML2LXA6
2. Regional language subtitles available for this course
To watch the subtitles in regional languages:
1. Click on the lecture under Course Details.
2. Play the video.
3. Now click on the Settings icon and a list of features will display
4. From that select the option Subtitles/CC.
5. Now select the Language from the available languages to read the subtitle in the regional language.

[@jackb2439]

3:21 No sir, with your voice it can't go into other room

[@sabeehaanwar6517]

What's mean by x is less than zero or equal to zero or greater than zero...

[@marekruzicka9866]

Simply a coordinate system, if we put condition at x=0, then x0 is another.

[@m-108]

But there is some error in the definition of R and T; otherwise, why don't they add up to 1? Please rectify that error.

[@the_colors_]

I think the expressions are correct. These don't add up to one, but reflection power coefficient and transmitted power coefficient add up to 1. Reference: cnx.org/contents/dTCAVSga@33.7:IEH5M2Ue@2/Reflection-and-Transmission-of-Mechanical-Waves